1. WHAT ARE THE SOURCES OF ENERGY ON COASTS? Rivers deliver sediment to the oceans. How are they distributed and how can the oceans cause erosion?

2. WHAT ARE THE SOURCES OF ENERGY ON COASTS? 1. Tides

3. WHAT ARE THE SOURCES OF ENERGY ON COASTS? 1. Tides 2.Waves

4. WHAT ARE THE SOURCES OF ENERGY ON COASTS? 1. Tides 2.Waves 3.Surges

5. WHAT ARE THE SOURCES OF ENERGY ON COASTS? 1. Tides 2.Waves 3.Surges 4.Tsunamis

6. WHAT ARE THE SOURCES OF ENERGY ON COASTS? 1. Tides* 2.Waves* 3.Surges 4.Tsunamis

7. How do Tides Work? N 363,104 km (225,622 mi) 406,696 km (252,622 mi)

8. How do Tides Work? N 363,104 km (225,622 mi) 406,696 km (252,622 mi) Earth Moon If Earth was not also revolving around the Sun, the moon would take 27.3 day complete a revolution. As the Earth is moving it actually takes 29.5 days.

9. Earth Moon N S Sun 5°

10. Earth covered in Oceans.

11. Moon Line of maximum gravitational pull

12. Ocean waters on this side pulled towards line.

13. Ocean waters on this side pulled towards line.

14. Ocean waters “shallower” than average. Low tide.

15. Ocean waters “deeper” than average. High tide.

16. Time 0 hours Earth’s Rotation

17. Time +3 hrs.

18. Time +6 hrs

19. Time +9 hrs

20. Time +12 hrs.

21. Time +15 hrs.

22. Time +18 hrs.

23. Time +21 hrs.

24. Time +24 hrs. High Tide High Tide High Tide Low Tide Low Tide

25. Earth’s Revolution around the Sun Approximately one month A twelfth of a full revolution 15° of a circle

26. Earth’s Revolution around the Sun Moon’s Revolution around the Earth. Day 1

27. Earth’s Revolution around the Sun Moon’s Revolution around the Earth. Day 1 Day 7

28. Earth’s Revolution around the Sun Moon’s Revolution around the Earth. Day 1 Day 7 Day 15

29. Earth’s Revolution around the Sun Moon’s Revolution around the Earth. Day 1 Day 7 Day 15 Day 22

30. Earth’s Revolution around the Sun Moon’s Revolution around the Earth. Day 1 Day 7 Day 15 Day 22 Day 29

31. Moon’s gravitational pull on the Earth

36. Sun’s gravitational pull on the Earth. Weaker because of distance, despite large mass.

37. Sun and Moon’s gravitational pull in SAME direction.

38. Sun’s gravitational pull on the Earth. Weaker because of distance, despite large mass. Sun and Moon’s gravitational pull in SAME direction. Sun and Moon’s gravitational pull OPPOSED.

39. Sun’s gravitational pull on the Earth. Weaker because of distance, despite large mass. Sun and Moon’s gravitational pull in SAME direction. Sun and Moon’s gravitational pull OPPOSED. SAME

40. Sun’s gravitational pull on the Earth. Weaker because of distance, despite large mass. Sun and Moon’s gravitational pull in SAME direction. Sun and Moon’s gravitational pull OPPOSED. SAME OPPOSED

41. Sun’s gravitational pull on the Earth. Weaker because of distance, despite large mass. Sun and Moon’s gravitational pull in SAME direction. Sun and Moon’s gravitational pull OPPOSED. SAME OPPOSED

42. Sun and Moon’s gravitational pull in SAME direction. Sun and Moon’s gravitational pull OPPOSED. SAME OPPOSED Full Moon Entire lighted portion visible from Earth

43. Sun and Moon’s gravitational pull in SAME direction. Sun and Moon’s gravitational pull OPPOSED. SAME OPPOSED Half Moon Only half of lighted portion visible from Earth

44. Sun and Moon’s gravitational pull in SAME direction. Sun and Moon’s gravitational pull OPPOSED. SAME OPPOSED New Moon Lighted portion invisible from Earth

45. Sun and Moon’s gravitational pull in SAME direction. Sun and Moon’s gravitational pull OPPOSED. SAME OPPOSED Half Moon Only half of lighted portion visible from Earth

46. Sun and Moon’s gravitational pull in SAME direction. Sun and Moon’s gravitational pull OPPOSED. SAME OPPOSED Full Moon Entire lighted portion visible from Earth

47. SAME OPPOSED SAME OPPOSED What we see from Earth “Waning” Moon “Waxing” Moon Full Half Full New

48. SAME OPPOSED SAME OPPOSED Impact of Sun on the strength of Moon’s tidal pull

49. SAME OPPOSED SAME OPPOSED Impact of Sun on the strength of Moon’s tidal pull ENHANCE

50. SAME OPPOSED SAME OPPOSED Impact of Sun on the strength of Moon’s tidal pull ENHANCE Weaken

51. SAME OPPOSED SAME OPPOSED Impact of Sun on the strength of Moon’s tidal pull ENHANCE Weaken

52. SAME OPPOSED SAME OPPOSED Impact of Sun on the strength of Moon’s tidal pull Weaken ENHANCE Weaken

53. SAME OPPOSED SAME OPPOSED Impact of Sun on the strength of Moon’s tidal pull Weaken ENHANCE Weaken

54. Low Tide Level High Tide Level

55. High tide Low tide